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Marc-André Bombeck
643d8a5a00
- the migration fills mood_a1 from the five-point label for every row that has none, and leaves the other four columns empty because there is nothing in a label to derive them from - guarded on the column being empty, so re-applying the migration is a no-op rather than an overwrite of an answer somebody gave since - the test reads the CASE arms back out of the .sql and compares them to the runtime map in both directions, so neither can drift alone - rows are asserted by value after the statement runs, and again after a second run, including one hand-set value that must survive it
50 lines
2.3 KiB
SQL
50 lines
2.3 KiB
SQL
-- v1.37 — the five level-A self-state values on a mood entry.
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--
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-- A mood entry has carried one 1-5 value since the first release. That value
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-- keeps its scale and its meaning; these five ride beside it, each 0-10 with
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-- its own anchors: pleasantness, stress, energy, connectedness and stability.
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--
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-- All five are nullable, which is what makes this an additive change rather
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-- than a table rewrite, and nullable is also the honest shape: only the first
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-- one can be derived from what a row already carries, and the other four stay
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-- empty until somebody answers them. A default would fill a hundred thousand
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-- historical rows with a number nobody chose.
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--
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-- No CHECK constraint on the range. Bounds are enforced server-side, the same
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-- way `mood_entry_tag_links.rating` documents: a future change to the scale
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-- must not strand rows written under the old one.
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ALTER TABLE "mood_entries"
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ADD COLUMN "mood_a1" INTEGER,
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ADD COLUMN "stress_a2" INTEGER,
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ADD COLUMN "energy_a3" INTEGER,
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ADD COLUMN "connection_a4" INTEGER,
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ADD COLUMN "stability_a5" INTEGER;
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-- Map every entry written before these columns existed onto the pleasantness
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-- scale. The five-point label is the only thing a historical row can answer
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-- from, so it is the only column filled: stress, energy, connectedness and
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-- stability stay NULL, because there is nothing to derive them from and an
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-- invented number would be indistinguishable from one somebody gave.
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--
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-- The anchors are 1/3/5/7/9, matching `MOOD_A1_MAP` in
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-- `src/lib/validations/mood.ts` — the runtime map and these arms are compared
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-- to each other by a test, so the two cannot drift apart. Not 0 and 10 at the
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-- ends: the five-point endpoints mean as bad or as good as that instrument
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-- can express, not as bad or as good as a person can feel, and pinning them
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-- to the extremes would make every mapped row read as more extreme than every
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-- hand-set one.
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--
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-- `WHERE mood_a1 IS NULL` makes a re-run a no-op instead of an overwrite. A
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-- migration re-applied against a database that has since taken real answers
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-- must not replace them with the mapped value.
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UPDATE mood_entries
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SET mood_a1 = CASE mood
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WHEN 'LAUSIG' THEN 1
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WHEN 'SCHLECHT' THEN 3
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WHEN 'OKAY' THEN 5
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WHEN 'GUT' THEN 7
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WHEN 'SUPER_GUT' THEN 9
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END
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WHERE mood_a1 IS NULL
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AND mood IN ('LAUSIG', 'SCHLECHT', 'OKAY', 'GUT', 'SUPER_GUT');
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